public RuleAction(LambdaExpression expression, IndexMap factIndexMap, IndexMap dependencyIndexMap)
{
_expression = expression;
_factIndexMap = factIndexMap;
_dependencyIndexMap = dependencyIndexMap;
_compiledAction = FastDelegate.Create<Action<object[]>>(expression);
}
public void Invoke(IExecutionContext context, IContext actionContext, Tuple tuple, IndexMap tupleFactMap, IEnumerable<IRuleDependency> dependencies)
{
var args = new object[_compiledAction.ParameterCount];
args[0] = actionContext;
int index = tuple.Count - 1;
foreach (var fact in tuple.Facts)
{
var mappedIndex = _factIndexMap[tupleFactMap[index]];
IndexMap.SetElementAt(ref args, mappedIndex, 1, fact.Object);
index--;
}
index = 0;
var dependencyResolver = context.Session.DependencyResolver;
foreach (var dependency in dependencies)
{
var mappedIndex = _dependencyIndexMap[index];
if (mappedIndex >= 0)
{
var resolvedDependency = dependency.Factory(dependencyResolver, new ResolutionContext(context.Session, actionContext.Rule));
IndexMap.SetElementAt(ref args, mappedIndex, 1, resolvedDependency);
}
index++;
}
try
{
_compiledAction.Delegate.Invoke(args);
}
catch (Exception e)
{
bool isHandled;
context.EventAggregator.RaiseActionFailed(context.Session, e, _expression, tuple, out isHandled);
if (!isHandled)
{
throw new RuleActionEvaluationException("Failed to evaluate rule action", _expression.ToString(), e);
}
}
}
public TerminalNode(ITupleSource source, IndexMap factIndexMap)
{
_factIndexMap = factIndexMap;
source.Attach(this);
}
public BetaCondition(LambdaExpression expression, FastDelegate <Func <object[], bool> > compiledExpression, IndexMap factIndexMap)
{
_expression = expression;
_factIndexMap = factIndexMap;
_compiledExpression = compiledExpression;
}
public BindingExpression(LambdaExpression expression, FastDelegate <Func <object[], object> > compiledExpression, IndexMap factMap)
{
Expression = expression;
_compiledExpression = compiledExpression;
_factMap = factMap;
}
public static IndexMap Compose(IndexMap first, IndexMap second)
{
var map = first._map.Select(x => second[x]).ToArray();
return(new IndexMap(map));
}
public BetaCondition(LambdaExpression expression, IndexMap factIndexMap)
{
_expression = expression;
_factIndexMap = factIndexMap;
_compiledExpression = FastDelegate.BetaCondition(expression);
}